WP-API DataActions with menus endpoint

DataActions_Menus.js

import axios from 'axios';
import alt   from './../alt/alt.js';

class DataActions {

	constructor() {
		const appUrl = 'http://andreypokrovskiy.com/projects/wp-api'; // Wordpress installation url

		this.pagesEndPoint = `${appUrl}/wp-json/wp/v2/pages`; // Endpoint for getting Wordpress Pages
		this.postsEndPoint = `${appUrl}/wp-json/wp/v2/posts`; // Endpoint for getting Wordpress Posts
		this.menusEndPoint = `${appUrl}/wp-json/wp-api-menus/v2/menus/`; // Endpoint for getting Wordpress Menus
	}

	// Method for getting data from the provided end point url
	api(endPoint) {
		return new Promise((resolve, reject) => {
			axios.get(endPoint).then((response) => {
			   	resolve(response.data);
			}).catch((error) => {
			    reject(error);
			});	
		});		
	}

	// Method for getting Pages data
	getPages(cb){
	    this.api(this.pagesEndPoint).then((response)=>{
	   		this.getMenus(response, cb)
	   	});
	}
	
	// Method for getting menus data
	getMenus(pages, cb){
	    this.api(this.menusEndPoint).then((response)=>{
	    	const menus 			= response
	    	const menusAndPages 	= { pages, menus };

	   		this.getPosts(menusAndPages, cb)
	   	});		
	}

	// Method for getting Posts data
	getPosts(menusAndPages, cb){
	    this.api(this.postsEndPoint).then((response)=>{
	    	const postsObj 	= {posts: response}
	    	const payload 	= Object.assign(menusAndPages, postsObj);

	   		this.getSuccess(payload); // Pass returned data to the store
      		cb(payload); // This callback will be used for dynamic rout building
	   	});
	}

	// This returnes an object with Pages and Posts data together
	// The Alt Store will listen for this method to fire and will store the returned data
	getSuccess(payload){
		return payload;
	}
}

export default alt.createActions(DataActions);